dual elevator servos
03-22-2011, 04:58 AM
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dual elevator servos
I was hoping someone could tell me how to set up dual elevator and dual aileron servos on a spectrum ar7000 with a dx7 radio. Thanks for any help
Chris
Chris
03-22-2011, 05:41 AM
#2
RE: dual elevator servos
I've the JR 7202 which is similar to the DX-7. This is how I did it. First, in the plane setup menu, (hold scroll and select button down while turning on power) I turned the aux 2 sw off so that I could use that channel for the slave servo.
Then in the trim menus, (turn on power and then press scroll and select simultaneous), I selected mix 6 as on the 7202 one must use either mix 5 or 6 to have trim tabs of the master affect the slave also.
My settings are:
[ul][*] elev to aux2 on[*] upper rate -90 lower rate -90[*] sw ON[*] offset: +5
[/ul]
Notes: My slave servo has slightly more throw than the master servo hence the 90% numbers. You will want to ensure that the servos have the same travel otherwise the elevators will induce a roll component. My master servo is also a reverse servo so that might change the rate numbers to positive numbers for you. I can't remember what the offset does, perhaps it centers the slave servo to the master. If using aux 2, be certain to turn its switch off in the aircraft setup section.
Then in the trim menus, (turn on power and then press scroll and select simultaneous), I selected mix 6 as on the 7202 one must use either mix 5 or 6 to have trim tabs of the master affect the slave also.
My settings are:
[ul][*] elev to aux2 on[*] upper rate -90 lower rate -90[*] sw ON[*] offset: +5
[/ul]
Notes: My slave servo has slightly more throw than the master servo hence the 90% numbers. You will want to ensure that the servos have the same travel otherwise the elevators will induce a roll component. My master servo is also a reverse servo so that might change the rate numbers to positive numbers for you. I can't remember what the offset does, perhaps it centers the slave servo to the master. If using aux 2, be certain to turn its switch off in the aircraft setup section.
